目的 进行良种银杏幼苗叶质量分析。方法 采用 HPL C方法测定银杏叶总黄酮含量。结果 实生苗 6月份含量明显高于 8月份与 11月份,极显著地高于嫁接苗 ;2岁树龄实生苗总黄酮含量是 5 0年树龄的 2 .5～ 3.8倍。嫁接苗 6月份高于 8月份,雌性高于雄性。结论 活性成分含量与生长季节、树龄、培育方式、生长环境、基地条件等诸因素有关.

Object To examine the quality of leaves from the improved Ginkgo biloba L seedling sprout Methods Total flavonoids in the leaves were determined by HPLC Results Flavonoids in the leaves of seedling sprout were apparently higher in June than in August and November, and were much higher than grafting seedling sprout which was also higher in June than in August 2 year old tree contained 2 5 to 3 8 times more flavonoids than 50 year old tree The content of female trees were higher than that of male Conclusion The content of active flavonoids were related to the season, age, breeding, environment and geographic conditions.